Coil-winding machine



' Lm QM J. J. VIEMNEAU com WINDING MACHINE l Filed June l, 1922 2 Sheets-sheen 1 Aug. 5

J. -J. VIENNEAU COIM WINDING MACHINE Filed June l, 1922 l Sheets-Sheet 2 Inventum; Jacob J Vientleamml ms Amm@ Patented iig. 5v, 1924. I

t 1,504,004 'r 1 OFFICE.

- JACOB J. viENNEAU, 0E rrrmsEIELD, MAssAcHnsErrs, AssIeNoE 'roGENENAL ELECTRIC COMPANY, A CORPORATION or NEW Yoan.

COIL-WINDING- MACHINE. l

Application filed June 1,

To all whom t may concern:

Be it known that I, J Aco J. VIENNEAU, a -citizen of the United States, residing at Pittsfield, in the county of Berkshire, State of Massachusetts, have invented certain new and useful Improvements in Coil-Winding Machines, of which the following is a specification.

My invention relates to coil winding machines and has for its object the provision of means whereby the coil may be more coml pactly and uniformly wound.

More specifically my invention relates to automatic machines for winding' electrical conductors and the like into coils. My invention is particularly applicable t0 the winding of transformer coils, field coils, etc. In order to make a more compact and uniform winding, it is common to wind each turn along a circumference of the spool rather than to make the winding in the form of a helix. When winding coils in this manner, the conductor is shifted at the end of each turn into the next succeeding turn and at the end of each layer the shifting movement is reversed for the next layer. `With present types of automatic winding machines which introduce the shifting movements in unbroken succession, the first turn of'each layerfalls at one side. instead of directly upon 4the last turn of the preceding layer. A gap is thus left between the first turn of each layer and the end of the spool equal in width to the amount of the shifting movement which ordinarily is equal to the width of the conductor. It follows that this method of winding results in loss of available space on the spool as well as in a non-uniform winding. y

In carrying out my invention, I have provided means for delaying or interrupting the shifting movement at the end of each layer, whereby the firstturn of each layerI may be wound in a predetermined relation with the last turn of the preceding layer so as to form a more compact and uniform winding. In one embodiment ,of my invention, I provide a lost' motion driving connection between the shifting means and the feeding device. The `arrangement is such that when the shifting means is reversed at the end of each layer, the first shifting movement of each layer, or, in other words,ithe shifting movement in the reversed direction immediately after the end of the preceding 1922. Serial No. 565,203.

layer, may be restricted or cancelled altogether, as desired, whereby the first turn may be made to fall directly upon or in'any predetermined relation with the last turn of the lpreceding layer.

motion coupling shown in Figs. 2 and 3;

Figs. 5 and 6 are partial section views showing a typical arrangement of the turns with round and square conductors,respectively, when using my invention; while Fig. 7 shows a modified form of my invention. v

Referring to Fig. 1 of the drawing, although I have shown my invention embodied in a specific type of automatic coil winding machine the details of which form no part of my invention, it will be obvious that it f may be applied to various other types of coil winding macliines.` In the specific mechanism shown, the spool 10 is carried o'n a shaft 11 which is driven by means of a chain 12 cooperating with a sprocket wheel 13 secured to the shaft. The spool may be releasablysecured to the shaft 11 so that it may be removed upon the completion of the winding operation, or the spool may be arranged in parts to permit the removal of the coil after being wound. As shown in the drawing, the electric conductor 14 or other material to'be wound is guided over two rollers 15 and 16 so as to be wound in layers on spool 10 as it is rotated. The guiding rollers 15 and 16 are carried on a suitable frame 17 which is constrained to move on guidebars 18 and 19 in a direction parallel with the axis of shaft 11.

The frame 17 is moved by an amount equal to the diameter of the conductor upon the completion. of each turn. whereby the conductor 141 is shifted into the next turn, each turn lying in a plane perpendicular to the 4axis of the coil, oi', in other words, along a circumference of the coil. A winding is thus formed 4of the type Vshown in Fig. 5. This periodic shifting movement is transmitted to the frame through a screw shaft 20 cooperating with a suitable nut 21 operatively connected to the frame. A ratchet drivin wheel 22 is secured to the left-hand end o shaft 20, and cooperating with the ratchet wheel are driving pawls 23 and 24, one or the other of which is adapted to engage the ratchet wheel depending on,the direction in which the frame 17 is 'being moved. The pawls 23 and 24 are pivotally mounted on arms 25 and 26, which are rin turn pivotally mounted on shaft 20, and are biased to positions to engage ratchetwheel 22 by means ofspiral springs 27 and 28.

Arms 25 and 26 are operatively connected to a slider 30'1movi'ng on a guide 31 by means of links 32 and 33. Carried by slider I` 30 is an adjustable pin 34 which extends thrgugh an arc-shaped, slot 35 in a lever- 36 pivoted on a fixed lpost 37. The pin 34 is shown secured onthe end of an arm 34 Awhich adjustable about its point of sup- .'port onslider .30, whereby pin 34 may be adjustedfin slot 35. On the upper end of lever 36 'is a roller or pin 38 which moves in a cam slot 39lin ka disk 40 secured to the the conductor into the next succeeding turn.:V471 The amount of this shifting movement can be r vilated to correspond with the size of 'the conductor by varying the movement given slider 30 by means of the adjustment provided for pin 34 in s101335. Y

For the purposeI bf controlling the `engagement of pawls 23 and 24 with the ratchet wheel, Ithe pawls are provided with actuating arms 40 and 41 having camfaces which are adapted to engage with opposite sides of a disk 42 carried by a sleeve43 loosely lmounted on shaft 20. When disk l42 is in the position shown in the drawing.

it engages arm 41, holding pawl-24 out of engagement with ratchet wheel 22, while arm 40 is free whereby pawl 23 is held in.

enga ement with the ratchet wheel by spring 27. lVhen disk 42 is moved to the left, it will engage arm 40, lifting pawl 23, and free arm 41, whereby pawl 24 is moved into engagement with the ratchet wheel 'by spring 28. The position of disk 42 is controlledby means of a yoke 44 cooperating with sleeve 43 and provided with an extension parallel with shaft 20 in which are nicks 45 and 46. Rawls 47 and 48 are providedadjacent opposite sides of this extension and are biased toward it so as to cooperate with nicks 45 and46, respectively, by a ,spiral spring 49.4

lever 69 'the left. l23 lifted so that the next shifting movement These pawls are carried on an arm I50 secured at its center at right angles to a shaft 51 which alsocarries an arm 52 cooperating with a lever 53. On the opposite end of lever 53 is a ypin 54 which moves in a cam groove 55 in'a collar 56 rigidly secured to Shaft 11. The cam groove 55 is generated so that arm' 53 is rocked in a clockwise direction onceeach revolution of shaft 11, which movement is transmitted through shaft 51 to the pawls 47 andy 43.

Adjacent pawls 47 and 48 are upright bars jand 61 which are biased in upward and downward directions respectively by spiralsprings 62 and 63. On the bars 60 and 61 are pins 64 and 65 lying in the path of pawls 47 and 48 so as to normally hold the pawls out lof nicks 45 and 46. The bars 60 and 61 are operatively'connected-through pin and slot connections to a transverse rod 66 extending parallel with shaft 2O and through frame 17. On the rodv66 are adjustable'co'llars or stops67 and 68 lying on opposite sides of frame 17, Qne of which is in position to be engaged by the frameas it nears the completion of its movement in either direction. The rod 66is normallyV biased to a central position by means of a provided with a centering spring 70. Rigidly secured to shaftv 20 are adjustable -anis 71 and 72 which. re adapted to cooperate respectively with projections 73 and 74, carried by bars 60 and 61, when rod 66 is moved by frame 17. The distance be-f tween projections 73 an'd74 is considerably less than the distance between arms 71 and y72. The projections are normally'biased by centering spring 70 in a central position between the arms so as not to be thereby as shaft 2O rotates.

The operation of this reversing mechanism is as follows: Upon the completion of a layer of the winding on spool 10, frame 17 will engage one or the other of stops 67 and 68 giving rod 66 movement .of translation solas to bring one or the other of projections 73 and 74 in position to be engaged by the corresponding arms 71 or 72.' Assuming,

for example, that rod 66 is moved toward the left, upon the next rotative shifting movement transmitted to will engage projection 73 depressing upright bar 60. This releases pawl 47, which will be moved by spring `49 into nick 45, and upon the rocking of lever 53 in a clockwise direction during the next turn will be actuated to move yoke 44 and hence disk 42` toward Pawl 24 is'thus released and pawl at the end of the turn will be given to frame 17 by pawl 24 and will be in the opposite direction, being the beginning of the next layer of the winding. Frame 17 Vwill then disengage stop 68, which is thereupon moved by centering spring 7 Of toward the left to its shaft 20, arm 71 I ductor.

central position in which projections 73 and 74 are between arms 71 and 72.

The driving nut 21 is provided withan oblique groove 75, cooperating with which is a -pin carried by the end of an upright bar 7G moving in a guide 77 in frame 17 and cooperating at its lower end with a guiding bar 78. The bar 76 thus forms the operating connection between nut 21 and frame 17. By adjusting bar 78 at an angle with guide bar 19, the arm 7 6 may be given movement of translation in its guide 77 a frame 17 is moved. In such case it will be observed that frame 17 will be given a slight move-` ment independently of nut 21 due to the effect of the oblique slot 75, and the direc'- tion and amount of this movement will depend on the direction and amount of the angleat which guide 78 is set with relation to guide 19. This independent movement -of frame 17 is .provided for more accurate mediately shifted in the opposite direction so that the first turn of the next layer will be displaced along the axis of the coilwith relation to the last turn of the preceding layer, so as to fall upon the next to the last turn of the preceding layer. A gap is thus left between the first turn of each layer and the end of the spool equal in Width to.

the amount of the shifting movement which is ordinarily equal to thewidth of the con- It will be noted that with this method of Winding there is a loss of space on the coil and furthermore the last turn of any layer has a tendency to drop into the gap left by the first turn of the preceding la er, thus forming an irregular winding. A, so, where a round conductoris used, the rst turn of each layer has a tendency to drop into the gutter between the turns of the preceding layer, thus further disarminging the winding.

Referring to Figs. 1 to 4, inclusive, of the drawing, in carrying out my invention in one form I interpose a lost motion coupling 80 in shaft 20. This coupling comprises two cooperating flanges 81'and 82f The shaft 20 is formed in two sections 20a and 20h, one of which carries a trunnion which fits in a corresponding recess in the other section, thusmaintaining the sections inl alignment. Section 20a is shown as provided with a transverse rectangular projection 83 which moves in central, arc-shaped slots 84 and 85 in anges 81 and 82 respectively. Flange 82 isv rigidly secured to section 20h, for example, by means of a pin 86, while ange 81 is shaped slots 89 and 90 in flange 81 whereby.

the relative angular positions of the flanges can be adjusted so as to regulate the freedom of projection 83 in slots 84 and 85, and hence the freedom of section 2O*1 with relation to section 20h. It will be observed that when the slots 84 and 85 are aligned, projection 88 has its greatest freedom of movement. This movement can be regulated from this maximum to zero by displacing the flanges.

With this coupling interposed in shaft 20, it will be observed that when the movement of frame 17 is reversed at the end of each layer, the first shifting movementin the reversed direction may be partially or wholly taken up by the lost motion in the coupling. The frame may be moved, for example, only half the width of the conductor for the gutter winding, as shown in Fig. 5, or with aA square conductorthe first shifting movementin each layer may be entirely taken up by the lost motion coupling, whereby the first turn of each layer vwill be placed directl'y upon the last turn of the preceding layer, as shown in Fig. 6. Very compact and uniform windings may thus be formed. The amount of this lost motion may be adjusted to correspond withv the size of the conductor being wound by turning flange 81 with relation to flange 82. Flange 81 may be provided with a scale 91, and flange 82 with a cooperating mark 91', whereby this adjustment may be accurately made.

In the modification of my invention shown in Fig. 7, I have provided means for adjusting the width of the oblique slot 75 in nut 21, thus lproviding a lost motion connection at this point.l IfVhen using this arrangement, the coupling 80 will not be used. The width of slot 75 may be conveniently -adjusted by providing a slider 92 which may be adjusted by screws 93 with rela- `tion to a shoulder 94 forming the opposite side of the slot.

While I have described my invention as embodied in concrete form and as operating in a specific manner in accordance with the provisions of the patent statutes, it should be understood that I do not limit my invention thereto, since various modifications thereof will suggest themselves to those skilled in the art without departing from the spirit of my invention, the scope of Which is set forth in the annexed claims.

What I claim as new and desire to secure by Letters Patent of the UnitedStates, 1s: v

1. A coil winding` machine for electrical conductors and the like comprising in combination with a spool, means for turning said spool and for feeding said conductor spool, means .for shifting said along a predetermined circumference of said spool, means for shifting said feeding means from one turn to the next, means for reversing said'shifting means at the end of each layer, andmeans for delaying the action of said shiftingk means in the reveise direction so as to Wind the first andV llast turns of successive layers in a different axial relation then adjacent turns `of th'e same layer. Y i

2. A coil winding machine for electrical i conductors and tlie like comprising in comeacli layerwliereby the first and last turns of successive layers may be wound in a predetermined relation.

A coil Winding-machine for electrical conductors and the like comprising in combinationlivitli .a spool, means for turning said spool and 'for feeding said conductor along a predetermined circumference of said spool, means for shifting said feeding means from one turn to the next74 means for reversing said shifting means at the end of each layer, and means for delaying the action of'said shifting means simultaneously with its reversal so as to cause llic i'ii'st turn of each layer to take a predetermined posialong a predetermined' circumference of said' spool7 means for shiftingl said feeding 'means fromone turn to the next,means' for 'reversing said shifting means at the end of each layer, and -a lost motion driving con-V nection for said shifting means whereby its action is delayed so'as to cause the first turn of each layer to fall in a predetermined position with relation tothe last turn of the preceding layer.

5. A coil Winding machine for electrical conductors and the like comprising in coinbination with a spool, means'for turning said spool and for feeding said conductor along a predetermined circumference of said spook means for shifting said feeding means from one turn to the next, means for reversing said shifting means at thc end of each layer, and a lost motion driving connectioii between said shifting means and said feeding means whereby thev shifting movement is temporarily interrupted simultaneously with its reversal so as to cause the first turn of each layer to fall onv the last turn of the preceding layer.

In Witness whereof, I have hereunto set my hand this 29th day of May, 1992-.

JACOB J.v vlammen.

'tion with relationl to tlielast turn of the l 

